Sales rose in all major markets except France, highlighting that country's struggle to kick-start growth. But analysts warned signs of an economic slowdown across the region could snuff out a fragile car market revival in the coming months.

"The recovery in the European auto market is mainly fuelled by catch-up effects in the (southern) crisis countries," said Peter Fuss, a partner and automotive specialist in Ernst & Young's German practice. "It remains weak and susceptible to a renewed economic setback that today seems likely again."

The International Monetary Fund warned last week that growth in the 18-nation euro area could be weaker than expected after the region's economy barely grew in the past two quarters, while unemployment remains locked at 11.5 percent.

Passenger car registrations in the European Union (EU) and European Free Trade Area (EFTA) rose to 1.11 million vehicles last month from 1.05 million in October 2013, the Association of European Carmakers (ACEA) said on Tuesday.

Europe's car market has now grown for 14 straight months. But after a six-year slump, it remains well short of its peak from before the financial crisis.

Sales in Spain, Portugal and Greece -- some of the hardest hit markets in the crisis -- jumped by more than 20 percent, as buying incentives from governments and carmakers helped to boost demand for Renault (>> Renault) and VW brand cars, whose European deliveries rose 10.5 percent and 4.5 percent respectively.

Germany, Europe's biggest single car market, was up 3.7 percent, while No.2 Britain jumped 14.2 percent, helped by cheap credit and its stronger economic growth.

By contrast, third-placed France slipped 3.8 percent.

Year-to-date deliveries in the EU plus EFTA region rose 5.9 percent to 11.02 million vehicles from 10.41 million in the year-earlier period, ACEA said.

Volkswagen (>> Volkswagen AG), Europe's biggest automaker, and PSA Peugeot Citroen (>> PEUGEOT) saw deliveries rise 6.9 percent and 1.1 percent respectively, while luxury nameplates BMW (>> Bayerische Motoren Werke AG) and Daimler (>> Daimler AG) were up 9.4 percent and 2.2 percent.

The only major group to post lower sales in October was General Motors (>> General Motors Company), with deliveries falling 5.1 percent as the withdrawal of the Chevrolet brand from Europe outweighed a 12 percent gain by its Opel brand.

George Galliers, London-based analyst at research group Evercore ISI, said a gloomy economic outlook was likely to hold back demand in the months ahead.

"To see a step up, it would require improved economic activity, lower unemployment and higher business confidence levels," Galliers said, predicting European car sales growth to slow to 3.5 percent in 2015 from 4.2 percent this year.

(Editing by Jonathan Gould and Mark Potter)

By Andreas Cremer